Zimbra Upgrade Failure

OS: Ubuntu 6.06 LTS (32-bit)

I had an upgrade failure today moving from 5.0.6_GA_2313 to 6.0.3_GA_1915.
First the installer said it did not like my host file (the one 5.0.6 is using) so I made changes until it was happy, and proceeded. After updating the database schema and in the process of updating ldap the install failed.

Here follow my original host file, the new host file accepted by the installer and the tail of the installer's log of the failure. Any ideas or suggestions would be appreciated.